I think you should call your dr first and ask what he/she thinks you should do. Obviously this just can't continue or you are going to have an episode, it sounds like you are close already. I'm so sorry you are being put in this position. You might have to come out to them but I would think getting your dr's help, a note of some sort to make it legal so you have something to say why you need to have them accommodate you as far as hours and such. When I had to postpone my student teaching a semester because of my breakdown, my dr wrote a note to my advisors. I got an incomplete for the semester and was able to do the student teaching the following semester. I say call your dr first and let him/her know your situation.

(((BUNCHES OF HUGS)))